Table of Contents
R-134A Refrigerant Pressure Temperature Chart - R-134A is an inert gas also known as Tetrafluoroethane, and for air conditioner systems. Furthermore, R134A is a chemical refrigerant in automotive and domestic use air conditioners. Additionally, HVAC Systems such as chilled water systems in both commercial markets and industrial markets. You are very familiar with R134A if you are either an automotive mechanic or a chiller mechanic. R-134A uses the names Tetrafluoroethane, Genetron, or Puron, among other names depending on the manufacturer. Finally, The pressure-temperature chart represents the average pressure-temperature relationship of refrigerant R-134A.
R-134A Refrigerant Pressure Temperature Chart
| PSIG | R-134A Temperature | PSIG | R-134A Temperature |
|---|---|---|---|
| (10) | -31 | 74 | 72 |
| (8) | -27 | 76 | 74 |
| (6) | -24 | 78 | 75 |
| (4) | -21 | 80 | 76 |
| (2) | -18 | 82 | 77 |
| 0 | -15 | 84 | 78 |
| 2 | -10 | 86 | 81 |
| 4 | -5 | 88 | 83 |
| 6 | -1 | 90 | 82 |
| 8 | 3 | 92 | 83 |
| 10 | 7 | 94 | 84 |
| 12 | 10 | 96 | 85 |
| 14 | 13 | 98 | 86 |
| 16 | 16 | 100 | 87 |
| 18 | 19 | 105 | 90 |
| 20 | 22 | 110 | 93 |
| 22 | 25 | 115 | 96 |
| 24 | 27 | 120 | 98 |
| 26 | 30 | 125 | 100 |
| 28 | 32 | 130 | 102 |
| 30 | 35 | 135 | 105 |
| 32 | 37 | 140 | 107 |
| 34 | 39 | 145 | 109 |
| 36 | 41 | 150 | 112 |
| 38 | 43 | 155 | 114 |
| 40 | 45 | 160 | 116 |
| 42 | 47 | 165 | 118 |
| 44 | 49 | 170 | 120 |
| 46 | 51 | 175 | 121 |
| 48 | 52 | 180 | 123 |
| 50 | 54 | 185 | 125 |
| 52 | 56 | 190 | 127 |
| 56 | 58 | 195 | 129 |
| 58 | 60 | 200 | 131 |
| 60 | 62 | 210 | 134 |
| 62 | 64 | 220 | 137 |
| 64 | 65 | 230 | 141 |
| 66 | 66 | 240 | 143 |
| 68 | 68 | 250 | 147 |
| 70 | 69 | 260 | 149 |
| 72 | 71 | 270 | 152 |
R-134A Refrigerant Pressure Temperature Chart
This table represents a pressure temperature chart for R134A. R-134A is a refrigerant frequently used in automobile air conditioning. Additionally, for larger chilled water systems in commercial and industrial chilled water systems.
Furthermore, R-134A is an HFC or hydrofluorocarbon refrigerant and, as noted, is used for automotive air conditioning. R-134A replaced the CFC refrigerant R-12. Finally, always follow manufacturers charging instructions when charging any chiller or auto air conditioner system with R-134A.
Whether purchasing R134A for HVAC or Automotive use, the purchaser must be licensed under EPA Clean Air Act regulations. R-134A was introduced in the ’90s as a replacement for R-12. R-12 was banned from manufacture and use by the Clean Air Act in the ’90s.
Furthermore, because R-134A is considered to have GWP or Global Warming Potential, it is required to be recovered from HVAC Systems rather than released into the atmosphere.
Refrigerant Leaks and Corrective Action (Via the EPA Website)
R-134A Refrigerant Pressure Temperature Chart
Rules for Leaks and Leak Repair: Section 608 of the Clean Air Act
An owner must take corrective action (leak repair) for a refrigeration system if:
- The appliance contains more than 50 lbs of refrigerant
- The refrigerant is leaking from the appliance exceeds the applicable trigger rate in a 12-month period
Trigger Rates
For all appliances that have a refrigerant charge of more than 50 pounds, the following leak rates for 12 months are applicable:
| Appliance Type | Trigger Leak Rate |
|---|---|
| Commercial refrigeration | 35% |
| Industrial process refrigeration | 35% |
| Comfort cooling | 15% |
| All other appliances | 15% |
In general, owners or operators must either repair leaks within thirty days from the date the leak was discovered. Otherwise, they must develop a dated retrofit/retirement plan within thirty days and complete actions under that plan within one year from the plan’s period. However, for industrial process refrigeration equipment and some federally-owned chillers, additional time may be available.
R-134A Refrigerant Pressure Temperature Chart
Technical Resource: Refrigeration and Air Conditioning Technology
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If i have a water tank of 15 m3 , then i want to cool the tank to 5 c , whats the capacity should be of my chiller ??
can i use the 134a freon which are commercially sold for Automotives to replace the current 134a brand that i use for commercial chillers?
134A is 134A. There is no difference. It is the same chemical.
The charts on the back of R134a recharge kits that are available in auto parts stores indicate a car’s low side pressure should be, for instance, 45-55 psi when the outside ambient temp is 85degF. To me, those kits’ charts seem incorrect since R134a is almost 58 degF at 55 psi. What do you think?
not really a car ac guy but its probably a good idea to follow the manufacturers instructions.
Can i get a relationship chart between ambient temperature of water & R-134a pressure, for a chiller unit. It would be very helpful. Thank you.
I would think you would use the chart provided as it is a pressure temperature chart. I do not think there would be any difference from the temperature of air to the temperature of water as long as the temperatures were the same then the pressure correlation would be the same from air to water.
hi sir i am Ajit moharana i am working in a small scale industries as per a hvac supervisor , sir we have a isue in morning time we r not able to switch on chiller dont no wt is the reason can u helf me sir
Check all your safety switches including the water flow switch. Can’t really say without looking at it.